$ darcs changes --xml HACKING hpc.README
<changelog>
<created_as original_name='./hpc.README'>
<patch author='Christopher Lane Hinson
&lt;lane@downstairspeople.org&gt;' date='20080521201003' local_date='Wed
May 21 22:10:03 CEST 2008' inverted='False'
hash='20080521201003-2da90-3e08df8b6ca526dc00f30e8e31c9eea5f0272869.gz'>
	<name>hpc.README for collecting hpc data.  Requires ghc &gt;= 6.8.3,
otherwise tests will break.</name>
</patch>
</created_as>
...

There is no created_as entry for for HACKING in the xml. This is
confusing. We should have an entry for every file that is included in
the query and add a query_name attribute to the created_as tag.
Otherwise, it is impossible to see which original_name belongs to which
of the files given as argument.

OK, sounds like potentially easy work.  The submitter will want to make
sure we have backwards compatibility, which doesn't seem like a problem
here.

working on this bug

I would rather be rid of --xml and especially the created_as since 
that adds considerable complication.